Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-90 page - construction/fate timeline, specifications, commanding officer, photographic record (verified live 2026-10-05) [other_primary]
- Locator
- NavSource 11/19090.htm - YMS-1 class header block, specifications block, photo captions, commanding-officer table
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 24 July 1941 by the Hubbard's South Coast Co., Newport Beach, CA; launched 19 December 1941; completed 24 July 1942; grounded at Buckner Bay, Okinawa, 9 October 1945 during Typhoon Louise; refloated 24 October 1945 and decommissioned; struck from the Naval Register 5 June 1946; destroyed September 1947. Spec block: displacement 270 t.; length 136'; beam 24'6"; draft 8'; speed 15 kts.; complement 32; armament one 3"/50 dual-purpose mount, two 20mm mounts, two depth-charge projectors; propulsion two 880 bhp General Motors 8-268A diesel engines, Snow & Knobstedt single-reduction gear, two shafts. Call sign Nan-Uncle-Roger-Echo. Commanding officer LT A. G. Dohrmann, USNR (1945). Photographic record: artist's rendition of YMS-56 and YMS-90 on the October 1942 Motor Boating magazine cover; a c. October 1945 photograph of YMS-90 aground at Okinawa. Page states 'There is no DANFS history available for YMS-90.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Construction trades, Hubbard's South Coast yard (1941-42); crew (1942-45); salvage personnel, ComServDiv 104 area (Oct-Nov 1945); demolition personnel (1947)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track NVR/DANFS-equivalent records but the 'destroyed September 1947' line is carried by NavSource alone among located sources (manner and place of destruction undocumented). Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-01
-
[2]uboat.net Allied Warships, USS YMS-90 (YMS-90) entry - order/construction dates, commissioning date, loss summary (verified live 2026-10-05) [other_primary]
- Locator
- uboat.net/allies/warships/ship/9510.html - vessel data table and history line
- Finding type
- vessel_history
- Finding
- Second-source milestone record for this hull: ordered 1 April 1941; built by Hubbards South Coast Co. (Newport Beach, California); laid down 24 July 1941; launched 19 December 1941; commissioned 24 July 1942; grounded at Buckner Bay, Okinawa, on 9 October 1945 during a typhoon; salvaged 24 October 1945 and decommissioned; stricken 5 June 1946.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1946
- Limitations
- Secondary compilation - corroborates NavSource dates and adds the order date and the 'commissioned' characterization of 24 July 1942 (NavSource says 'completed'). Does not carry the 1947 destruction detail. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-02
-
[3]NARA Special List #44 - List of Logbooks of US Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (by ship number); logbook holdings in RG 24, Entry 118 (NAID 581208) [other_primary]
- Locator
- sl-44-ship-number.pdf, YMS-number block: 'YMS-90 8/18/1942 6/30/1945'; holdings note at archives.gov/research/military/logbooks/navy/
- Finding type
- historical_record
- Finding
- NARA's official logbook inventory lists deck logs for YMS-90 covering 18 August 1942 - 30 June 1945, held as textual records at Archives II, College Park (RG 24, Entry 118, NAID 581208). The logs are not among the digitized holdings on the NARA navy-online deck-logs page (checked 2026-10-05). These logs document the daily activity, locations, and personnel of this hull across most of its commissioned service.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-1945 (coverage)
- Population
- YMS-90 crew, Aug 1942 - Jun 1945
- Limitations
- Archival lead, not a fetched record: the inventory establishes that logs exist and their date coverage, not their contents - individual entries were not examined. Coverage ends 30 June 1945; no logbook coverage for July-October 1945 (including the Typhoon Louise grounding and decommissioning) is inventoried in Special List 44 for this hull. The logbook inventory documents service, not exposure; deck logs contain no asbestos-survey function.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-03
-
[4]Department of the Navy - Naval Historical Center, 'Typhoons and Hurricanes: Pacific Typhoon at Okinawa, October 1945' - transcription of Commander in Chief, U.S. Pacific Fleet and Pacific Ocean Areas Report, Serial 0395 of 11 February 1946 (World War II Command File, Operational Archives Branch), including Appendix III typhoon-damage table (ARCHIVED page: live history.navy.mil URL returned 404 on 2026-10-05; Wayback capture of 4 Dec 2000 verified) [other_primary]
- Locator
- Appendix III table, YMS block, and narrative paragraphs on ComServDiv 104 salvage assignment
- Finding type
- vessel_history
- Finding
- The CinCPac/CINCPOA report documents the 9 October 1945 Typhoon Louise disaster at Buckner Bay (Nakagusuku Wan), Okinawa - 12 ships and craft sunk, 222 grounded, 32 damaged beyond ship's-force repair, 36 dead and 47 missing - and lists YMS 90 by name in Appendix III ('Typhoon Damage at Okinawa, Based Upon Progress Reports to 19 November'): 'Refloated 10/24/45. Return rear area, decommission.' Salvage work was assigned to ComServDiv 104 (Commodore T. J. Kelleher); after ComServPac inspected the damage on 14 November, only 10 of ~90 damaged ships were judged worth complete salvage given the rapid decommissioning of unneeded types. The appendix separately lists YMS 383 'Grounded - Sunk, strike from register' and YMS 384 'Sunk' - unit-level context for the storm that ended this hull's service.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-10 to 1945-11 (report to 19 November progress reports; report issued 11 Feb 1946)
- Population
- YMS-90 crew at grounding (Oct 1945); ComServDiv 104 salvage crews; Buckner Bay ships' companies
- Limitations
- Primary government record naming this hull's typhoon disposition, but it is a damage/salvage accounting - it does not record crew exposure, materiel condition detail, or (obviously) asbestos. 'Return rear area, decommission' is the directed disposition; it does not state where the hull was sent or how/when it was finally destroyed (NavSource alone carries 'destroyed September 1947'). Live NHHC page is dead; archived capture used and labeled.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-04
-
[5]U.S. Navy WWII campaign/engagement credit listing for YMS-90 - transcription of Navy and Marine Corps Awards Manual NAVPERS 15,790 (Rev. 1953); operation codes and windows corroborated against the official regulations extract 'DANFS: Area Campaign Medals & Battle Stars, World War II' at ibiblio.org/hyperwar (G.O. No. 253 framework) [other_primary]
- Locator
- officialmilitaryribbons.com YMS-1..200 table, 'YMS 90' rows; hyperwar BattleStars.html Part III Asiatic-Pacific code table (P26-2, P34-1)
- Finding type
- vessel_history
- Finding
- NAVPERS 15,790 (per transcription) credits YMS-90 with two Asiatic-Pacific operations: P26-2 'Occupation of Kwajalein and Majuro Atolls' (credited window 31 January - 8 February 1944) and P34-1 'Assault and occupation of Okinawa Gunto' (credited window 25 March - 30 June 1945) - i.e., two WWII engagement credits (battle stars). The official regulations extract corroborates the operation designators and overall windows: P26-2 29 January - 8 February 1944; P34-1 24 March - 30 June 1945. Secondary order-of-battle compilations place YMS-90 in TG 52.10 (Minesweeping and Hydrographic Group, Cmdr. F. F. Sima USNR) Unit 2 with YMS-91, YMS-383, and YMS-388 for Operation Flintlock - the Kwajalein/Majuro operation matching the P26-2 credit.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1944-01 to 1945-06
- Population
- YMS-90 crew during credited windows (Jan-Feb 1944; Mar-Jun 1945)
- Limitations
- Ship-level credit rests on a secondary transcription of NAVPERS 15,790; the underlying official volume was not directly inspected this session (locating a digitized NAVPERS original is an open lead). The transcription's credited-window dates differ slightly from the official operation windows (31 Jan vs 29 Jan 1944; 25 Mar vs 24 Mar 1945) - normal for ship-specific credit periods. The TG 52.10 unit assignment is documented only in secondary OOB compilations (built on Morison/Rottman), not verified against the operation plan. No asbestos content - an award/service record, not a materiel record.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-05
-
[6]shipbuildinghistory.com (Tim Colton compilation), South Coast Shipyard page, Newport Beach CA - yard history and delivery table; companion class table at shipbuildinghistory.njscuba.net/us-navy-small/ym/ [other_primary]
- Locator
- southcoast.htm delivery table (YMS 90 row) and yard-history paragraph
- Finding type
- vessel_history
- Finding
- Builder documentation: South Coast Shipyard ('also known by several similar names') was started in the late 1930s by Walton Hubbard at 2300 Newport Boulevard, Newport Beach CA, and closed in 1963. The yard delivery table records YMS 90 - US Navy minesweeper, 278 t, 136 ft - delivered 24 July 1942, 'Struck 1946'. The yard's wartime output was small wooden naval craft: YMS 88-93 and 259-264 and 317-319, several PCS/YMS conversions, crash boats, and YP patrol boats - a classic yacht-yard wartime builder. Yard sisters' fates bracket this hull's: YMS 88 to the USSR as T-608; YMS 92 mined off Okinawa and lost 1945; YMS 91 sold into British Columbia registry as Marabell.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1945 (yard's YMS production)
- Population
- South Coast Shipyard construction trades (1941-45 output)
- Limitations
- Specialist secondary compilation - the standard public reference for small-yard build lists, but not a primary registry. Displacement listed at 278 t vs NavSource's 270 t (minor figure variance across sources). Yard name variants (Hubbard's South Coast Co. / South Coast Shipbuilding / South Coast Shipyard) refer to the same Newport Beach yard. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-06
-
[7]Era inference built on: NavSource YMS class index (navsource.net/archives/11/19idx.htm - wooden-hulled class, 561 hulls from 35 yacht yards, Nevins design, YMS-1..134 two-stack configuration); NavSource YMS-90 spec block (two GM 8-268A diesels, no steam plant); shipbuildinghistory YM class table ('35 boatyards turned out 561 wooden-hulled minesweepers'); GAO HRD-80-2 Navy asbestos-use era (see ev-08) [other_primary]
- Locator
- NavSource 19idx.htm class narrative; NavSource 11/19090.htm spec block; shipbuildinghistory ym/ class table
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel-driven auxiliary minesweeper built 1941-42 at a yacht yard sits inside the Navy's documented asbestos-use era but carries a much smaller asbestos-relevant system inventory than steam combatants: no boilers, no turbines, no steam piping - so no boiler/turbine lagging pathway. Era-standard applications aboard a small diesel combatant were machinery exhaust lagging, engine and machinery gaskets and packing, and electrical insulation; the wooden hull and 136-ft scale bound the inventory. The grounding-and-salvage event (October 1945) and 1947 destruction are disturbance contexts for any era materials present.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Construction trades, South Coast Shipyard (1941-42); crew (1942-45); salvage/demolition personnel (1945-47)
- Limitations
- Class/era inference only - no hull-specific material list, insulation survey, or work package located for YMS-90. Names era-consistent applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution for this hull. Small-vessel diesel/wood construction means materially less asbestos than a steam combatant - inference must not be inflated.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-07
-
[8]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (published 18 Oct 1979, released 22 Oct 1979) [gao]
- Locator
- GAO product page HRD-80-2, Highlights section
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's efforts to protect workers from asbestos exposure: the Navy used asbestos insulation aboard ships, and per the product-page highlights the Navy's 1975 policy was to remove and replace with nonasbestos materials only insulation that was damaged or had to be removed for repairs, modified in 1979 to selectively replace asbestos insulation in high-maintenance areas - program-level documentation that this hull's entire construction and service era (1941-47) lay inside the Navy's asbestos-use era.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1979 (report); era documented spans this hull's whole life
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull - the review's fieldwork was Long Beach and Norfolk Naval Shipyards (nothing to do with this hull's build or service), and it documents 1970s policy, not 1940s construction. Content via product-page highlights; raw curl returns HTTP 403 to automated fetch (firecrawl-rendered page verified 2026-10-05).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-08
-
[9]Batch-9174 search ledger (this record): NavSource; uboat.net; NARA Special List 44 + navy-online digitized list; NVR; NHHC faq102-6 (archived CinCPac Serial 0395); NAVPERS 15,790 transcription + HyperWar official code extract; shipbuildinghistory yard/class pages; CourtListener (4 base queries); secondary web sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-90-yms90-01 through -14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming USS YMS-90 (YMS-90) was found in the public sources searched. CourtListener base queries returned zero results: '"USS YMS-90"' opinions 0 hits, '"USS YMS-90"' dockets 0 hits, '"YMS-90"' opinions 0 hits. CAVEAT: the fourth mandatory base query ('"YMS-90"' dockets) could not be run - the fleet pacing limiter reported the shared ~58/hr budget spent across ~50 minutes of spaced retries; logged as blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced no asbestos content naming this hull at all - not even the law-firm listicles that commonly list Navy hulls. No DANFS entry exists for this vessel.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - the hull's undigitized deck logs (1942-45), builder work papers, and salvage/disposal records were not examined and may not survive. One CourtListener repository cut ('YMS-90' dockets) is an open gap - paced, not searched. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-90-yms90-09